ICD-10 Code G43.419 – Hemiplegic migraine, intractable, without status migrainosus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.419 – Hemiplegic migraine, intractable, without status migrainosus
What it is
This code identifies hemiplegic migraine that does not respond well to treatment and is not accompanied by status migrainosus. It is used when the migraine includes temporary one-sided weakness as part of the attack.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include migraine with aura plus reversible motor weakness on one side, often with other neurologic symptoms such as visual or sensory changes.
When to use this code
Use this code when the record clearly states hemiplegic migraine and the provider documents that it is intractable. It also applies when the episode is specifically without status migrainosus. Check the note for laterality details and any associated aura features.
Do not use for
Do not use this code if the migraine is responsive to treatment, if status migrainosus is documented, or if hemiplegic migraine is not confirmed. Check documentation when weakness is due to another neurologic disorder.
Coding tip
Match the code to the provider’s exact wording for intractable and without status migrainosus.